Find the Square root of the following numbers by Repeated Subtraction and show whether they are perfect squares or not :
a) 125 b) 121 c) 81
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125 -1=124;124-3=121;121-5=116;116-7=109;109-9=100;100-11=89;89-13=76;76-15=61;61-17=44;44-19=25-21=4... end
Not a perfect square as there is a remainder.
121-1=120;120-3=117;117-5=112;112-7=105;105-9=96;96-11=85;85-13=72;72-15=57;57-17=40;40-19=21;21-21=0
Hence a perfect square as no remainder.
81-1=80;80-3=77;77-5=72;72-7=65;65-9=56;56-11=45;45-13=32;32-15=17;17-17=0
It is also a perfect square as no remainder is there.
Brainliest plz.
Step-by-step explanation:
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